Arcadia Biosciences, Inc. (NASDAQ: RKDA) shares gained 16.6 percent to $8.02 after the agricultural food ingredient company and its partner Shriram Bioseed announced the achievement of a key milestone. The company's ESL technology realized significant and consistent improvements in field yield and fruit quality in tomatoes.

SenesTech, Inc. (NASDAQ: SNES) gained 14.1 percent to $1.689 after the company reported the sale of ContraPest to Pestmaster Services for the product's first deployment in California.

AC Immune SA (NASDAQ: ACIU) gained 12.2 percent to $13.215. AC Immune said it has priced its 10 million share offering at $11.75 per share, with the offer expected to generate gross proceeds of $86.8 million.

Danaher Corporation (NYSE: DHR) rose 5.6 percent to $104.30 after the company reported better-than-expected earnings for its second quarter and raised its FY18 outlook. The company also announced plans to spin off dental business into a publicly traded company in the second half of 2019.

Losers

Mersana Therapeutics, Inc. (NASDAQ: MRSN) shares dipped 38.1 percent to $10.195 as the FDA placed partial clinical hold on the company’s XMT-1522 cancer drug after patient death, which is not confirmed to be related to drug.